Milling machine



3 SheetsSheet 1.

(No Model.)

B P HALL MILLING MACHINE.

' Patented Feb. 25, 1896.

iNVENTOR WITNESSES RAHAM PHUTo-Lmifl. WASHINGTON D C (No Model.) 3Sheets--Sheet 2 R. P.-HALL.

MILLING MAGHINE.

Patented Feb. 25, 1896.

INVENTUR (No M55151. 3 Sheets-Sheet a.

R. F. HALL. MILLING MACHINE.

No. 555,372. Patented Feb, 25, 1896.

IMarZZ'IaZZ.

UNTTED STATES PATENT OFFICE.

ROBERT FREDERICK HALL, OF BIRMINGHAM, ENGLAND.

MlLLiNG-MACHINE.

SPECIFICATION forming part of Letters Patent N0. 555,372, dated February25, 1896.

Application filed August 12, 1895. Serial No. 559,087. (No model.)Patented in England June 1, 1895, No. 10,857.

To all whom, it may concern.-

Be it known that I, ROBERT FREDERICK HALL, managing director of theCycle Components Manufacturing Company, Limited, a subject of the Queenof Great Britain, residing at Ferndale, Church Road, Moseley, in thecity of Birmingham, England, have invented a certain new and usefulImprovement in Milling-Machines and I do hereby declare the following tobe a full, clear, and exact description of the invention, referencebeinghad to the accompanying drawings, which form part of thisspecification, and for which said invention I have obtained LettersPatent of Great Britain dated the 1st day of June, 1895, and numbered10,857.

This invention relates to machinery for the milling or rotatory cuttingof various articles, such as cycle chain-whoels,wheel-hubs, bosses ofcranks and other circular or part circular and irregular shapes.

The principal object of the invention is a machine which willsimultaneously mill a number of articles and which can be attended to bya single operator.

The said machine works continuously durin g the taking off and puttingon of the work and is to an extent automatic, as the operative can leavecutters operating upon two or more articles while he is attending toanother or to others.

Figure 1 of the accompanying drawings represents, partly in verticalsection and partly in elevation, a milling or circular-cutting machinewith its accessory parts constructed according to my invention. Fig. 2represents a vertical section of the upper and slide part of the machineupon the dotted line 50, Fig. 1, looking outwardly. This view shows themeans of driving the work from oif a countershaft. Fig. 3 is ahorizontal section of the said machine upon the dotted line A, lookingdownward. Fig. 4 represents a vertical section of Fig. 3 upon the dottedline B, looking inwardly. Fig. 5 is a horizontal section upon the dottedline C, Fig. 1, looking upward. Fig. 6 is a horizontal section upon thedot-ted line D, Fig. 1, but looking downward.

Passing vertically through the middle of a fixed bed a, which issupported upon the under side by upright legs a having feet a is anupright and cross split or divided main driving-shaft 1), consisting ofupper and lower sections 1) 6 coupled together above the bed by acoupling socketed and inside grooved at its upper end 0 within whichsocket and its groove the lower feathered end b b of the section b ofthe shaft takes, and is capable of sliding therein, but carrying thecoupling with it in its rotatory movement. The said upper part of theshaft b, which has an overhead driving-pulley b and clutch e forthrowing the shaft into and out of gear, turns within bearings (Z d of ahanger- .bracket cl bolted to the ceiling of a workshop.

The clutch e is operated by a lever e pivoted at e.

The coupling 0, connecting the upper and lower sections of the shaft, isinside righthand screwed at c at its lower part, into which takes a likescrewed stalk b partly surrounded by a loose hardened-steel clampingbushf, located within a vertical socket-bean ing g of an elevated and armedbridgebracket g, bolted at the ends of its ends 9 to the bed a. Alsopassing partly up the steel bush f is a plain part of the spindle 6 witha shoulder b between which and the under side of the said loose bush f arotatory milling tool or cutter h is located, and is made to turn withthe lower part, 6 of the shaft bythe impingement and frictional contactbetween the said bush and the shoulder, the said cutter being broughtdead home to its bearing by the upper part of the shaft turning with itthe slightly-traversing coupling, which, when rotated in a forwarddirection, screws itself upon the wormed end I) and is thereby made toadvance and impinge upon the bush, which in its turn bears upon the bushand clamps the same firmly to the shaft, although, if necessary, thesaid cutter may take upon a feather formed on the part of the stalk ofthe shaftwhich it surrounds.

The extreme lower part 1) of the shaft has a feather 1) upon it, andsurrounding the feather and shaft is a bevel-wheel b which gears incommon with three bevel-wheels 1 each made fast to the inner end of .ashaft *6, passing through bearings i of legs a, and with the outer endsof each of the said shafts having a long driving-pulley i around which aband 6 taking also over a pulley 3', fast to the outer end of atraversing counter-shaft working in a hanging bracket a of the bed (1passes. Each of these counter-shafts j has a worm j at its inner end,meshing with a worm-wheel j", made fast upon an upright shaft j Workingthrough a bearing on of a slide-rest m, traversing the gap a in the beda and held therein by guide-strips m adj ustably brought up to thechamfered sides of the slide by inclined-headed pins m The slides aretraversed by traversing-screws n, having hand-wheels n for theiroperation, and having their inner ends '17 swivelly connected to theslides, and their middle parts passing through screw-boxes 0 of abolted-on strip 0, secured to the fixed bed a.

The vertical shafts 7' carry work-tables j at their summits, to whichthe work is secured by a bolt 3' or otherwise, while each slide islimited in its inward traverse-4. e., toward the work-by a gage-stop 19,whose inner end is fixed in the slide and the other end passed through ahole 0 in the strip 0, while the extreme outer end of the stop-rod has ahead 1), which comes against the face of the strip 0 and forms the stop.Thus, assuming that an article carried by the rotatory table requires tobe milled, dressed, or cut down to a certain extent by the rotatorycutter, the amount of milling which it shall receive is regulated by theextent which the stop will allow the slide carrying the work to traversetoward the cutter.

Each machine is provided with a number of difierent stops, varying inlength to corre spend with the kinds and depths of cut to be given tothe work.

Referring again to the lower end of the shaft, the same works within asupplementary socket q, supported, through the intervention ofantifriction-balls (1 by a socketed crossbearing q, bolted to the legsof the framing a, and with the vertical shaft adjusted and kept up toits work by a pin Q3.

Assuming that articles to be operated upon are secured to thework-tables, and assuming that the said tables are away from the cutter,then the operative starts the machine by throwing the clutch into gear,when the cutter is rapidly rotated and the work-tables, with the work,are slowly turned. The operative then brings the work on one table up tothe cutter by turning the hand-wheel of the traversing screw of theslide and immediately the work has been gapped. The operative thenleaves the cutting to proceed automatically while he attends to thebringing of the next slide with its work-table and work thereon up tothe cutter, which acts in common on the several sets of work underoperation. He then brings up the third piece of work and comes again tofirst piece, and if the milling or out should require to be deepenedthen he propels the slide farther and the cutting proceeds to a greaterextent,which may be limited by the gage-stop being traversed toward thecutter beyond a certain extent. Should, however, the first piece of workhave been fully milled, the depth of cut having been regulated by thegage-stop, the 0perative reverses the hand-wheel, when the slide iswithdrawn an d the work is taken out of the range of the cutter andremoved from the table and fresh work substituted for it, when theoperations described are repeated.

Having fully described my inventiomwhat I desire to claim and secure byLetters Patent is 1. In a milling-machine, the combination of a fixedbed, a central shaft extended upward through said bed and carryingasingle cutter above the same, a series of radiallydisposed slidesmounted in the bed, a series of rotary work-tables mounted in saidslides in the same horizontal plane with the cutter and surrounding thesame, and traversing worm-gearing for said tables, substantially as andfor the purpose described and set forth.

2. In a milling-machine, the combination with a single and centralcutter, mounted on an upright shaft and coming above the plane of thebed, which carries radially disposed and working slides traversed byswiveling propelling and repelling screws suitably working withinscrew-boxes in the fixed framing, of work-tables surrounding and comingin the same horizontal plane as the cutter and located above the bed andcarried by vertical shafts working through bearings in the said slidesand having a rotatory motion imparted to them by traversing worm-gearingcarried within bracket bearings attached to the slides, substantially asand for the purpose described and set forth.

3. In a milling-machine, the combination with a single and centralcutter, mounted on an upright shaft and coming above the plane of thebed, which carries radially disposed and working slides traversed byswiveling propelling and repelling screws suitably working withinscrew-boxes in the fixed framing, of work-tables surrounding and comingin the same horizontal plane as the cutter and located above the bed andcarried by vertical shafts working through bearings in the said slidesand having a rotatory motion imparted to them by traversing worm-gearingcarried within bracket-bearin gs attached to the slides and driven byband and pulley gearing receiving their motion through radially-directedcounter-shafts running in bearings in the framing and carryingbevel-wheels at their inner ends meshing with a bevel-wheel on thevertical and principal shaft, substantially as and for the purposedescribed and set forth.

4. In a milling-machine, the combination with a single and centralrotating cutter surrounded by radially directed and traversingwork-carrying slides driven by reciprocating gear whose motion isreceived from stationary gear driven from the vertical shaft upon whichsaid cutter is mounted, of a divided shaft split at a point above saidcutter and with the parts connected by a lengthwise-adjustable couplingwhose socketed upper end takes upon a feathered lower part of the uppersection of the shaft and whose insidescrewed lower part takes upon thescrewed upper end of the lower part of the shaft, the lower end of saidcoupling impinging upon a hardened-steel bush located between it and thetop side of the rotatory cutter whose lower side rests upon a shoulderof the shaft formed above the plane of the bed, substantially as and forthe purpose as described and set forth. 5. In a milling-machine, thecombination with a single and central rotating cutter carried by thelower part of a vertical shaft and coming between the opposed ends ofradiallytraversing work-carryin g slides, of a bridgebraeket having abossed bearing wherein is located a hardened-steel bush surrounding theupper part of the adjustable lower section of the shaft and comingbetween the shaftcoupling and the cutter, substantially as and for thepurpose as described and set forth.

6. In a milling-machine, the combination with a split vertical shaft,whose upper and lower sections are united by an adjustable coupling, andhaving mounted upon the upper part of its lower section a rotatingcutter disposed between radiating work-carryin g slides traversingbetween guides and between gaps of the bed, of bevel-gearing meshingwiththat wheel carried by the lower part of the shaft connected thereto by afeather and with the lower end of said section of shaft working within alower bearing-socket and being adjustable therein by a pin takingthrough the bottom of the said socket, substantially as and for thepurpose as described and set forth.

In testimony that I claim the foregoing I have hereunto set my hand this31st day of July, 1895.

ROBERT FREDERICK HALL. lVitnesses:

HENRY SKERRETT, ARTHUR T. SADLER.

